Switch 7700 Command reference Guide, v2.0

116 CHAPTER 5: USING ROUTING PROTOCOL COMMANDS
RIP Configuration
Commands
This section describes the commands you can use to configure the Routing
Information Protocol (RIP).
When the Switch 7700 runs a routing protocol, it is able to perform the functions
of a router. The term router in this section can refer either to a physical router or to
the Switch 7700 running a routing protocol.
checkzero Syntax
checkzero
undo checkzero
View
RIP view
Parameter
None
Description
Using the checkzero command, you can check the zero field of RIP-1 packets. By
default, RIP-1 performs zero field checking.
Using the undo checkzero command, you can disable the checking of the zero
fields.
According to the RFC1058 protocol specifications, some fields in RIP-1 packets
must be set to zero. These are called zero fields. During the zero check operation,
if a RIP-1 packet is received in which the zero fields are not zeros, it will be
rejected. Using the
checkzero command, you can enable or disable the zero
check operation on RIP-1.
This command does not work with RIP-2 packets, since RIP-2 packets have no zero
fields.
Example
To configure the Switch not to perform zero checking for RIP-1 packet, enter the
following:
[SW7700-rip]undo checkzero
default cost Syntax
default cost value
undo default cost
View
RIP view
Parameter
value Enterthe default routing cost, in the range 1 to 16. The default is 1.